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Table of contents
List of Figures
List of Tables
Notations
Introduction
1 Non-contact micromanipulation
1.1 Electric field driven effects
1.2 Dielectrophoresis
1.3 Optical tweezers
1.4 Electrowetting
1.5 Magnetic manipulation
1.6 Acoustic waves
1.7 Manipulation via actuated flows
1.8 Summary
1.9 Conclusions
2 Opto-fluidic actuation for non-contact micromanipulation
2.1 Theoretical background
2.1.1 The fluid mechanics laws
2.1.2 Hypothesis on the model
2.1.3 Dimensionless numbers
2.2 Natural convection
2.2.1 The microfluidic system
2.2.2 Simulations
2.2.3 Comparison to experimental measurements of flows
2.3 Thermocapillary convection
2.3.1 Surface tension
2.3.2 Marangoni effect
2.3.3 Working principle
2.3.4 Formulation
2.4 Conclusions
3 Experimental analysis of thermal-induced convection flows
3.1 Introduction
3.2 Experimental set-up
3.2.1 Microheat source: Infrared laser λ = 1480 nm
3.2.2 2-DOF mirror scanner
3.2.3 Sample preparation
3.3 Experimental analysis of convection flows
3.3.1 The disturbed fluidic zone
3.3.2 Velocity measurements
3.3.3 Influence of larger beads
3.3.4 Micro-objects floating on the water-air interface
3.3.5 Estimation of the manipulation force
3.4 Conclusions
4 Toward a fully automated vision-based opto-fluidic system for non-contact micromanipulation
4.1 Vision feedback for micromanipulation
4.1.1 Optical flow
4.1.2 Image segmentation
4.1.3 Hough transform
4.1.4 Image correlation
4.2 System calibration
4.3 Micromanipulation: Operation modes
4.3.1 Manual operation mode
4.3.2 Automatic operation mode
4.4 Conclusions
Conclusions and Perspectives
Bibliography
